James Cameron back on surface after deepest ocean dive ( 11 Kms )

Hollywood director James Cameron has returned to the surface after plunging nearly 11km (seven miles) down to the deepest place in the ocean, the Mariana Trench in the western Pacific.He made the solo descent in a submarine called Deepsea Challenger, taking over two hours to reach the bottom.He spent more than four hours exploring the ocean floor, before a speedy ascent back to the surface.His